Machine for trimming the soles of boots and shoes



Jan. 31, 1928. 1,657,632

J.MARCUS MACHINE FOR TRIMMING THE SOLES OF BOOTS AND SHOES Filed NOV. 5, 1925 84 Fig. 1.

INVENTUR Patented Jan. 31, 1928.

UNITED STATES PATENT.OFFICE.

.mcon MARCUS, or HOLLAND,

MICHIGAN,

ASSIGNOR T0 UNITED SHOE MACHINERY CORPORATION, OF PATEBSON, NEW JERSEY, CORPORATION OF NEW JERSEY.

MACHINE FOR TRIMMING THE SOLES OF BOOTS AND SHOES.

Application filed November a. so-called rounding or rounding and chain neling' machine and such machines are usually fitted with a reciprocating trimming knife which is arranged to cut with a chopping action against a cutting block and which is particularly adapted for trimming leather soles.

One object of the present invention is' to improve the construction of machines of this type for the purpose of better adapting them for operation upon shoes having soles made of crepe rubber or like material, and particularly for operation upon shoes the bottoms of which comprise an uutrimmed crepe sole and another part, such as a leather welt the outer edge of which has previously been trimmed or finished to final shape.

With the above object in view, one feature of the invention consists in the provision, in a machine of the class described. of a reciprocating trimming knife, and means for en-. gaging the edge of a portion of a shoe bottom previously shaped substantially to final marginal contour to locate relatively to the knife a portion of the shoe bottomto be trimmed and for rigidly supporting the shoe bottom againstthe thrust of the knife. The illustrated machine is particularly designed to operate upon shoe bottoms comprising a leather welt and a two-ply sole consisting of first and second units or layers of crepe rubber, the welt and the first sole unit being trimmed substantially to final shape before the second sole unit is applied to the shoe. As shown, the machine is provided with a trimming knife having a lateral cutting edge extending in the general direction of movement of the knife. so that the knife will cut with a draw stroke as distinguished from a chopping stroke, and the work guide or edge gage is provided with guiding faces for engaging the trimmed or previously shaped edge of a leather welt to guide the work as it is fed past'the knife, and with bearing surfaces for engaging the outer or Serial No. 67,046.

exposed face of the welt to'su portthe sole n'largin against the thrust of the knife.

To insure proper trimming of soles by means of a reciprocating trimming knife adapted to cut as above described, it is desirable to arrange and operate the knife so that it will extend entirely through the sole with the tip or free extren'iity of the knife projecting beyond the sole at all times. To facilitate the operation of such a knife the illustrated edgegage. in accordance with another feature of the present invention. is notched or recessed between the faces which engage the edge of the welt or other trimmed portion ofthe shoe bottom to receive the proJectihg tip of the knife. this construction the edge gage is adapted properly to guide and support the work without interfering with the stroke of the knife and further a bearing' is provided for the back of the knife so that the knife is supported against the thrust of the work being fed against it.

After a shoe having a crepe sole has been worn for a while it often happens that the sole margin becomes distortcd'so that the edge faces flare outwardly from the upper to an objectionable degree. In order to avoid such a condition, provision is made, in accordance with another feature of the present invention, for relatively positioning the trimming knife and the sole supporting means so that the knife will trim the sole margin at an angle so as to produce a beveled face slanting inwardly from the welt to the tread face of the sole. As shown, this result is attained by mounting a sole positioning and supportingroll at an angle to the perpendicular substantially equal to the angle of bevel desired to be imparted to the sole edge so that the roll will function as agage accurately to position the sole to predetermine the angle of bevel of the trim mingcut. Preferably, and as illustrated, the.

roll is arranged to engage the central portion of the tread face of the sole and a second roll is located so as to engage the sole nearer its edge and is mounted for tilting adjustment. so to accommodate itself to th plane of the sole. This second roll is shown as being acted upon by a spring tending to maintain it with its axis perpendicular to the path of the trimming knife so that it mayv serve also as a gage to position a sole for the making By means of 1 of the knife slide 20.

work guide showing also the trimming knife in operative relation to the guide and a. portion of a shoe the sole oi which 1s being trimmed by the knlte;

Fig. 3 is a perspective view of the trimmin knife P3 7 Fig. 4: is a perspective view of the lower or worleenigaging portion of the work guide showing also a portion of the trimming knife; and

Fig. 5 is a fragmentary View, partially in side elevation and partially in section, of the operative parts ot the machine illustrating particularl the manner in which a. shoe is positioned and supported for the trimming of the solo at a hovel.

In the drawings the invention has been shown as embodied in a sole rounding machine oi the type disclosed in United States Letters Patent No. 1,030,606. granted June 25, 1912, in the name of F. H. Perry. The illustrated machine is provided with a trinr ming knife 6, a work guide and support 8, and a back rest or sole support 10, these parts being mounted upon a head 12 supported upon a pedestal 1st.

As best shown in Fig. 3, the trimn'iing knife 6 comprises an elongated blade ground atone side to form a lateral cutting edge 16 somewhat inclined with respect to the longitudinal axis of the knife so that as the knife is reciprocated longitudinally and the work is fed against it. there will be a slight advance of the cutting edge in the direction of feed at each cutting stroke.

-The knife 6 is formed with a shank portion 18 which is secured in a. knife-carrying slide 20 (Fig. l) and the slide 20 is IGClPl'OtlliQd through an oscllh'itine yoke 22 provided with a horizontal arm 24 connected with the slide 20 and also provided with vertical trunnions 26 mounted in hearings in the head 12. The arm 2% carries a roll 28 which is engaged by hearing; blocks 30 arranged between transverse ribs 32 on the under side A horizontal shaft 3 1 is journaled in the yoke 22 and an arm 36 is secured upon the shaft 34 and is provided with a cylindrical part 38 which extends at right angles to the shaft 34. This cylindrical part of the arm 36 fits within an inclinedbearing 4:0 forn'ied within the enlarged extremity of the main cam shal t at) of the machine. The means just described for reciprocating the trimming; knife is similar in construction and mode of opcration to correspoinling means disclosml in the above-mentioned Letters Patent No. 1,030,606. to which reference may he had for further description and illustration thercoi'. In order to facilitate the operation of the lateral edged knife it is prel'errcd, in the illustrated machine, to drive the cam shall at a higher speed than in the nnuzhine oi? the Perry patent so that the triuuninp; knile will he reciprocatcd more rapidly, and to make the bearing 40 in the. can: shaltinclined somewhat less with respect to the axis of the shaft than is the rorrespondinn hearing shown in the Perry pa tent. so as To shorten the stroke oi the trinnning knife.

The work guide and support 8. as host shown in Fig. 2 is hail shaped and comprises a work-engaging portion -10 trained at the lower extreinitic' of two vertical arms 4C8 which are rigidly secured to the head 12 by means of screws :30 extending through vertical slots 52 in the upper ends ot the arms 4B. The work support and uide S is adapted to support the sole agai st the endwise thrust oi the trimming knife and to gage the location oi? the work relaliwl v to the knife by engagen'ient with the edge oi the welt or other previously trinnned poi tion of the shoe bottom. The W()ll{-0Hf {'ll iing lower portion of the work guide is 'l'ur ther so constructed as to avoid intm'lerenee with the end oi the trimming knii'e which projects liieyond the sole and overlaps the welt and to provide a. hem-inn tor the hark of the knife to support the knife against lateral thrust caused by feeding of the work against the knil e. As shown, the wort: guide 8 is recessed or notched at M- to receive the endot the tril'nnling knits and the back or rear edge 50 of the knife is arranged to hear against a portion of the worl-z guide at one side of the notch The notch Yul is made deep enough to permit up-aud down adjustment of the work n'nide relatively to the knife for the purpose of :u'cruratrlr dcljfiil'llllllllQj or varying the rehrtion oi the trin'ln'ied cdn'e ol the sole to [he n'erionsly trimmed edge of the writ. The proiertions 55% which are formed at opposite sides ol' the notch Fi l. are cut away to Form shoulders (l0 and (ii on each proiection. llhese shoulders 0 and ('19. are offset from the path of the knife in the line ol" Food and are arranged to engage the work both in adranre of and beyond the point (at ognaratirm ol' the trimming kni'l'e, the slniuhlers (l0 heinn arranged to engage the edge and the ahoulders 62 the outer or exposed tactot' the welt. The shoulders (32 therel'orc serve to support the sole nis-zrn'in against the end thrust of the knife in one di ection while the hack rert it) receives the end thrust of the knife in the other direction. The slots loo 52 in the arms of the work guide permit vertical adjustment of the guide to enable the knife to cut in accurate alinement with the previously trimmed portion of the shoe bottom. These slots 52 also enable the work guide 'to be adjusted vertically relatively to the knife so that the trimming cut may be made to extend across the first unit or layer of the crepe sole and across the welt as well as across the second or outer unit of the sole. The last mentioned adjustment is advantageous when the sole is to be trimmed at a bevel to cause the first or inner sole layer and the welt to be beveled also so that their edges will be flush with the edge of the outer sole layer. A plurality of 7 work guides having welt edge engaging shoulders of different widths may be 111181 changeably employed to accommodate welts of different thicknesses.

The sole rest or back support 10 comprises a slide 68 carrying upper and lower sole engaging rolls 70 and 7 2 The slide 68 is mounted for vertical adjustment in a support 74 rigidly secured to the front extremity of a hollow shaft 7 6 which is mounted to slide lengthwise inbea-rings 78 in the head 12. A sleeve 80 is secured upon the shaft 76 and is arranged to engage one end of the front bearing 7 8 to limit the forward movement of the shaft 76 and consequently of the back rest or sole support. The back rest 10 is pressed forwardly to maintain it in yielding engagement with the tread surface of the sole by a spring 82 the upper end of which is secured to an adjustable bolt 8% carried by the head 12 and the lower end of which is connected to an arm 86 secured to a rock shaft 88. A second arm 90 is secured to the rock shaft 88 and is connected with a rod 92 the front end of which carries ahead 94- engaging the end of the bore in the hollow shaft 76. The back rest may be moved rearwardly in introducing or removing the work through a rock shaft 96 one end of which carries an arm 98 engaging a lug 100 on the sleeve 80. A bell crank lever 102 is secured to the rock shaft 96 and one end of the lever 102 extends into position to be conveniently operated by the hand of the operator and the other arm is connected by a rod 10% with an operating treadle (not shown). The mounting of the back rest, so far as it has been described. and the manner in which the back rest may be retracted from work-engaging position is substantially the same as that disclosed in the aforementioned Perry patent. In the machine of the Perry patenu however, the back rest carries a channeling knifeand is vibrated back and forth in the line of feed for the purpose of facilitating the operation of the knife, but in the machine herein illustrated no channeling knife is employed and it is not desirable to vibrate the back rest. Accordinglythe backrest is held against vibration by means of a horizontal stud 106 projecting from an arm 108- The rollers 70 and 72 which are carried by the back rest slide 68 are so arranged that their axes will extend at right angles to the edge of that portion of a solewhich is being acted upon by the trimming knife so that the rollers will turn freely the shoe is fed. The upper roller 70 is mounted. to rock relatively to the slide 68 so that .it will tilt to accommodate itself to variations in the transverse curvature of the sole and also to permit the sole to be inclined bodily with respect to the trimming knife for the purpose of producing a bevel at the trimmed edge of the sole. The lower roller 72 is permanently positioned with its axis disposed at an acute angle to the path of any given point. in the trimming knife so that it will position a sole to insure that its margin will be beveled by As shown in Fig. 5, the upper the knife. I roller 70 is mounted in ablock116 having segmental ribs one of which is shown at 118,

engaging curved guiding slots formed in the slide 68. The block 116 is retained in the slide 68 and the rocking movei'nent of the block is limited by means of a spring-pressed pin 120 carried by the slide 68 and projecting into a slot in the block 116. The above described mode of mounting the block 116 for rocking movement in the slide 68 and the means for retaining the block in place and for limiting the extent of its rocking movement are substantially the same-as corresponding means described in the aforesaid- Perry patent in connection with the channel knife block, and a transverse pin 122 may be employed in the illustrated machine for en gaging the pin 120 in a manner similar to that described in said patent for use in withdrawing'the pin 120 to permit the removal of the block 116 from the slide 68. In the illustrated machine, as distinguished from the construction disclosed in said patent, the rocking block 116 is acted upon by a spring 124, connected at one end to the block 116 and at its opposite end to the slide 68. the spring tending to hold the roller 7O 7 with its axis in a vertical position but permitting the block 116 to rock so that the roll-er 70 may tilt to accommodate itself to the position of the sole.

In order to avoid undesirable flaring of the edges of crepe soles, such as often occurs after such soles have been worn a certain length of time provision has been made for trimming the sole at a bevel. This may be accomplished in the illustrated machine by tilting the shoe A so that the sole B will be inclined relatively to the knife 6 and the til] the roller 70 in position to be engaged by the tread face of the sole and with its axis inclined to the vertical at an angle substantially equal to the angle of bevel desired. hen a shoe is tilted as above described the upper roller 70 will readily tilt with the solev of the shoe until the axis of the upper rollor is brought. into alignment with the axis of the lower roller, as shown in Fig. 5. When, however, there is no work present in the machine the spring 124 will function to hold the upper roller 70 with its axis vertical in which position this roller serves as a gage to position a sole so that the trimming knife will trim the edge at right angles to the faceof the sole.

Inusing the machine the back rest 10 is retracted and the shoe is positioned with the Welt C projecting into the notches 62 in the edge gage 8, the edge of the welt bearnig against tl'ieshoulders and the outer face of the welt bearing against the shoulders 62. The back rest is then released and the roller yieldingly engages the tread face of the sole. The edge of the welt will then be definitely located relatively to the trimming knife 6 (ordinarily with the edge of the welt in horizontal alineinent with the cutting edge of the knife) and the margin of the crepe sole B will project upwardly beyond the path of the knife. If it is desired to trim the edge of the sole at right angles to the face of the sole the shoe will beheld with the sole substantially vertical but if it is desired to produce a beveled edge the shoe is tilted until it engages the lower roller 72, the upper roller 70 rocking bacle Wardly to permit the tilting of the shoe, By means of the roller 7 2 the sole is located, as shown in Fi 5, so that the sole will be trimmed to produce the beveled edge 1). By loosening the crews 50 the edge gage 8 may be adjusted vertically so that the knife 6 in addition to trimming the sole Bwill also cut a thin trimming from the edges of the \velt G and first crepe sole layer or unit E.

The invention having been described, what I claim as new and desire to secure by Letters Patent of the United States is:

1. In a machine of the class described, in combination, a reciprocating trimming knife,and means for engaging the edge of a portion of a shoe bottom previously shaped substantially to final contour to locate relatively to the knife a portion of the shoe bottom to be trimmed and for rigidly supporting the portion of the shoe bottom to be trimmed against the thrust of the trimming knife.

2. In a machine of the class described, in combination, a reciprocating trimming determining the proper angle knife, and a rigidly, mounted work guide for engaging the edge of a portion of a shoe bottom previously shaped substantially to final contour to lo-ate relatively to the knife a portion of the shoe bottom to be trimmed and for engaging the side of said portion to support the portion of the shoe bottom to be trimmed against the thrust of the trimming knife.

3. In a machine of the class described, in combination, a reciprocating trinnning knife for ope ating upon the margin of a shoe bottom fed past the knife, means for engaging the cdge of a portion of a shoe bottom previously shaped substantially to final contour to locate relatively to the knife :1 portion of the shoe bottom to be trimmed, and means offsetfrom the path of the knife in the line of work feed for engaging the side of the shoe bottom adjacent to the upper to support the shoe bottom against the thrust of the trimming knife.

l. In a machine of the class described,

in combination, a reciprocating trimming knife, means for engaging the edge of a portion of a shoe bottom previously sha icd substantially to final contour to locate relatively to the knife a portion of the shoe bottom to be trimmed, and means offsetfrom the path of the knife for engaging the side of the previously shaped portion of the shoe bottom to support the shoe bottom against the thrust of the knife.

5. In a machine of the class described, in combination, a reciprocating trimming k11ife,rigid means for engaging the edge of a portion of a shoe bottom previously shaped substantially to final contour to locate relatively to the knife a portion of the shoe bottom to be trimmed and for supporting the shoe bottom against the thrust of the knife in one direction, and means for sup porting the shoe bottom against thethrust of the knife in the other direction.

6. In a machine of the class described, in combination, a reciprocating trinmiing knife, means for engaging the edge of a portion of a shoe bottom previously shaped substantially to final contour to locate relatively to the knife a portion of the shoe bottom to be triuuncd and for supporting the shoe bottom against the thrust of the kni to in one direction, and a roller for engaging the tread face of the shoe bottom only at a point adjacent to the plane of opcrutimi of the knife to support the shoe bottom against the thrust of the knife in the opposite direction.

7. In a machine of the class described. in combination, a reciprocating trimming knife. a rigid edge gage constructed and arranged to engage the previously trininncd edge of a welt on a shoe to position the sole of the shoe relatively to the trin'nning knife, and a bearino: face on the gage for engaging the face of the welt and the projecting margin of Sal the sole at the sides adjacent to the upper of the shoe.

8. In a machine of the class described, in combination, a reciprocating trimming knife having a lateral cutting edge, and an edge gage recessed'to receive one end of the trimming knife and having a guiding surface for engaging the edge of a previously trimmed portion of the bottom of a shoe to locate an untrimmed portion of the shoe bottom relatively to the trimming knife.

9. In a machine of the class described, in combination, a reciprocating trimming knife having a lateral cutting edge, and an edge gage recessed to receive one end of the trimming knife and having a guiding surface in the plane of the cutting edge of the knife for engaging the edge of a previously trimmed portion of the bottom of a shoe to locate an untrimmed portion of the shoe bottom relatively to the trimming knife.

10. In a machine of the class described, in

combination, a reciprocating trimmin knife having a lateral cutting edge, an edge gage recessed to receive one end of the trimming knife and having a guiding surface for engaging the edge of a. previously trimmed portion of the bottom of a shoe to locate an untrimmed portion of the shoe bottom relatively to the trimming knife, and a bearing face on the edge gage for the back of the trimming knife to support the knife against the thrust due to the feeding of the work.

11.-I11 a machine for rounding the soles of welt shoes, in combination, a reciprocating trimming knife having av lateral cutting edge, an edge gag-e for engaging the edge of the Welt to locate the sole relatively to the trimming knife, and means on the edge gage for engaging the exposed face of the Welt in advance of the point of operation df the knife for supporting the shoe against the thrust of the knife.

12. In a machine for rounding the soles of Welt shoes, in combination, a reciprocating trimming knife having a lateral cutting edge, an edge gage for engaging the edge of the welt to locate the sole relatively to the trimming knife, and means on the edge gage for engaging the exposed face of the Welt beyond the point of operation of the knife for supporting the shoe against the thrust of the knife.

13. In a machine for rounding the soles of shoes, in combination, a reciprocating trimming knife, a sole edge gage for lo eating the sole of a shoe relatively to the knife as the sole is being fed past the knife, and a back rest comprising a roller across which the sole may be fed, said roller having its axis disposed at an acute angle to the path of the knife for positioning the sole for the trimming of a beveled edge.

14.. In a machine of the class described, in combination, a reciprocating trimming knife, an edge gage for locating the bottom of a shoe relatively to the knife, a roller for engaging the marginal portion of the tread face of the sole, and a second roller for engaging the tread face at a point removed from the margin, the second roller being mounted with its axis inclined relatively to the plane of the knife and the first roller being mounted for tilting adjustment to accommodate changes in the position of the sole of the shoe.

15. In a machine of the class described, in combination, a trimming knife, an edge guide for the bottom of a shoe, a back rest having a roller mounted thereon for tilting adjustment to permit the shoe to be positioned with the sole at different angles with respect to the knife, and yielding means tending to maintain the roller with its axis perpendicular to the path of the knife.

In testimony whereof I have signed my name to this specification.

JACOB MARCUS. 

